Gigabyte GA-H110M-DS2V REV: 1.0 Very fast repair when power is off

Gigabyte GA-H110M-DS2V REV: 1.0 Very fast repair when power is off

Gigabyte GA-H110M-DS2V REV: 1.0 Power on and power off are very fast. Remove the two capacitors OBC15 and OBC16, and find that 2_ The resistance of 5LEVEL to the ground increases a lot. The resistance at both ends of OBC15 is measured, while the resistance at both ends of OBC16 is infinite. The OBC15 is not installed directly, and it is OK to turn on the machine.

Machine model: Gigabyte GA-H110M-DS2V REV: 1.0

Fault phenomenon: the power is turned off very quickly

Maintenance process: Gigabyte GA-H110M-DS2V R1.0 was powered down very quickly when it was started up. The upper tube of CPU power supply was tested to be free of short circuit. VCCIO 0.95V was only 0.45V. VCCSA did not supply power. VCCIO was tested to be free of short circuit_ EN_ 1 Only 0.45V.

Gigabyte GA-H110M-DS2V REV: 1.0 Very fast repair when power is off Figure 1.

Tracing 2_ 5LEVEL found that the voltage was only 1.1V, which was generated by the fourth pin of IO.

Gigabyte GA-H110M-DS2V REV: 1.0 Very fast repair when power is off Figure 2.

After the voltage division of two resistors, the resistance value measured online is K, and the two capacitors OBC15 and OBC16 are not installed on the drawing, but the real object is installed. The resistance value measured at both ends of the capacitance is only about 200 Ω, which is abnormal.

Gigabyte GA-H110M-DS2V REV: 1.0 Very fast repair when power is off Figure 3.

Remove the two capacitors and find that 2_ The resistance of 5LEVEL to the ground increases a lot. The resistance at both ends of OBC15 is measured, while the resistance at both ends of OBC16 is infinite. The OBC15 is not installed directly, and it is OK to turn on the machine.